Improvement in dogs for saw-mill carriages



s. B. .mTTENHoUsE- IH H 'DOGS FOR SAW-MILL CARRIAGE'S.

APatented Nov. 7,1876.

. ATTORNEYS.

UNITED STATES PATENT yEEToE.

IMPROVEMENT IN DOGS FOR-SAW-MILL CARRIAGES.

Specification 'forming part of Letters Patent No. 184,109, dated November 7, 1876,l application filed Aprn 7, 1876.

.To all whom it may concern Be it known that I, S. B. RITTENHoUsE, of Liberty Mills, in the county ot' Wabash and State of Indiana, have invented certain new and useful Improvements in Dogs for Saw- Mill Garriages; and 1 do hereby declare that the followingis a full, clear, and exact description thereof, which will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to improvements in dogs for holding logs or timbers in position on saw-mill carriages while being sawed into strips or boards, the nature of which will be hereinafter fully explained.

In the-drawings, Figure l represents a side elevation of apparatus constructed according to my invention. 1

A represents a base or foundationpiece which is to be connected to the mill-carriage andv operated by ordinary means. B is a standard, by preference formed cylindrical, the lower end of which is tted into or is secured to a vertical post, B', mortised into the base-piece A, while its Lipper end is retained in position by an inclined support or rod, C, the lower end of which is alsoconnected to the base-piece A. When the standard B is secured to a vertical post, B, an additional side brace, C', is attached, having its lower end secured to the post B.

D is a bracket or arm extending backward from the upper end of the support (l, and adapted to support a pulleyblock, E, over the pulley E of which is carried a chain 'or rope, F, oneend of which is connected to an arm, G, while its opposite end is furnished with a weight, H, adapted to counterbalance the weight of the arm G.

The arm G at G is formed to slide vertically on the standard B. When it is desired to turn the arm G out ofthe Way, it may be raised and lowered at will, owing to its being counterbalanced b V the Weight H, and may be set in any position necessary to bring its outer end to the desired place on the log. L is an adjustable guide, which, at L1, is formed -so as to slide vertically on the standard B,

and of being fixed rigidly" thereto by means of a set-screw, L2, when desired. The guide L at its front end is provided with a bearingface, L3, andsharp edge or point L4 adapted to support or to be driven into the edge of and hold the last board in position, so as to obviate the necessity of the operator placing his hand to the board, so as to hold the same steady, thereby avoiding many of the acci dents frequently happening to operators in saw-rnills.

The arm G is provided with a longitudinal vertical slot or mortise, 4in which is placed the swinging hooked arm fn., having its outer end pointed, as shown at nl, while its inner end is pivoted or hinged within said slot at n2. In the outer end of' said slot is pivoted the lever o, the lower end of which is formed with the cam-shaped head o', so arranged that when the lever is drawn toward the standard B the outer end ot' the arm n will be pressed downward, and the point nl forced into the log.. By pushing the lever outward to the position shown, the arm u will be released when the point n' is drawn out ofthe log by the lever p, which is pivoted to the side ot' the arm G at p1, and has its end 102 bent under the said arm, so as to catch and lift the swinging arm n. It will be readily seen that the attachments shown in the guide L are the same in construction and operation as those described in the arm G.

Having described myinvention, what liclaim and desire to secure by Letters Patent, is

l. The combination, with the vertical standard B, of the arm G, counterbalance weight H, cord or chain F, and pulley E', substantially as shown and described.

2. The combination, with the arm G, of the swinging arm n and lever o, having the carnshaped head 0, substantially as described, and tor the purpose stated.

3. The combination, with the arm G and swinging arm n, of the lever p, as and for the purpose herein set forth.

In testimony that I claim the foregoing as my own I hereto afx my signature in presence of two witnesses.

SILAS B. BITTENHOUSE.l 

